BUGANi currently sells six open-ear earbuds, priced from $19.99 to $49.99. The short version: the Free B11 ($25.99) has the longest battery life at up to 35 hours, the Free B16 ($49.99) is the only one rated IPX6 and the only one with Bluetooth 6.0, and the Fit B18 ($19.99) is the budget pick. Everything below is taken from BUGANi’s official product specifications, not from lab testing.
The short answer: which model should you buy?
Match the model to your main use, because the lineup is deliberately spread across battery, water resistance, and fit:
- Longest battery life: Free B11 — up to 9–10 hours per charge and 35 hours total with the case.
- Most water-resistant: Free B16 — IPX6, the only open-ear model rated above IPX5.
- Clip-on fit: Fit B17 — the only clip-style model, with a 12mm driver and 24 hours total.
- Best value: Fit B18 — $19.99, Bluetooth 5.4, 26 hours total.
- AI translation: Free B10 — the only model with built-in AI language translation.
- Large driver for the price: Free B15 — a 14.2mm composite diaphragm driver at $29.99.
Full spec comparison
These are the published specifications from each product page. Where a spec is not published, the cell says “not specified” rather than guessing.
| Model | Price | Bluetooth | Playtime (per charge / total) | Water resistance | Driver |
|---|---|---|---|---|---|
| Free B10 | $29.99 | 5.4 | 6.5h / 26h (500mAh case) | IPX5 | Dynamic driver |
| Free B11 | $25.99 | 5.4 | 9–10h / 35h | IPX5 | Dynamic driver |
| Free B15 | $29.99 | 5.4 | 10h / 30h | Not specified | 14.2mm composite diaphragm |
| Free B16 | $49.99 | 6.0 | 30h total | IPX6 | Dynamic driver |
| Fit B17 | $29.99 | 6.0 | 6h / 24h (3 case charges) | IPX5 | 12mm dynamic driver |
| Fit B18 | $19.99 | 5.4 | 6.5h / 26h | Not specified | Not specified |
What open-ear actually means for comfort
Open-ear earbuds rest outside the ear canal instead of sealing inside it, so they do not block surrounding sound. That is the trade that defines the whole category: you trade some bass response and noise isolation for situational awareness and all-day comfort. All six models use ear hooks (ABS or silicone) and claim pressure-free wear, which is the main reason people switch from in-ear buds for running, cycling, and office use. Wireless earbuds as a category are covered in depth on Wikipedia if you want the broader background.
Ear hook vs clip: the two fit styles explained
There are two distinct fit mechanisms in this lineup, and they feel different on the ear:
- Ear hook (Free B10, B11, B15, B16): a curved hook wraps around the back of the ear to hold the driver in place. The Free B10 and Free B11 use lightweight ABS hooks; the Free B15 and Free B16 use flexible silicone hooks.
- Clip (Fit B17): the driver clips directly onto the ear rim, with no hook behind the ear. Fit B18 sits between the two — its product page describes lightweight silicone ear hooks, making it closer to the hook style.
There is no objectively better style — it depends on your ear shape and whether you wear glasses (hooks and glasses arms can compete for space). If you can, try both mechanisms, because comfort is the spec no datasheet can tell you.
Free B10: the translation model
The Free B10 ($29.99) is the only model with AI language translation built in. Outside of that feature, its published specs are Bluetooth 5.4, IPX5 sweat and rain resistance, 6.5 hours per charge, and up to 26 hours total with the 500mAh charging case. It is a reasonable all-rounder, but it no longer holds any battery or connectivity record in the lineup.
Free B11: the battery champion
The Free B11 ($25.99) publishes the longest battery life in the open-ear lineup: 9–10 hours per charge and up to 35 hours with the case. It matches the Free B10 on Bluetooth 5.4 and IPX5, and it adds a noise-canceling microphone for calls. If you commute and forget to charge, this is the model that forgives you.
Free B15: the biggest driver for the money
The Free B15 ($29.99) uses a 14.2mm composite diaphragm driver — the largest driver spec published in this lineup — and publishes 10 hours per charge with 30 hours total. Note that its product page does not publish a water-resistance rating, so treat it as a daily-use indoor model rather than a gym model.
Free B16: the only IPX6 + Bluetooth 6.0 model
The Free B16 ($49.99) is the premium open-ear model and the only one rated IPX6, which means it can handle heavy sweat, rain, and stronger water exposure than the IPX5 models. It is also the only open-ear model with Bluetooth 6.0 and ENC microphones for call clarity. Its product page publishes 30 hours of total battery life without a per-charge figure.
Fit B17: the clip-on
The Fit B17 ($29.99) is the only clip-style model in the group: instead of a hook that wraps the ear, it clips onto the ear. It publishes a 12mm dynamic driver, IPX5, 6 hours per charge, and 24 hours total (three extra charges from the case). If the hook design of the Free series never felt secure, the clip mechanism is worth trying.
Fit B18: the $19.99 value pick
The Fit B18 ($19.99) keeps the essentials — open-ear comfort, Bluetooth 5.4, 6.5 hours per charge, and 26 hours total — at the lowest price in the lineup. Its product page does not publish a water-resistance rating or driver size, so buy it for commuting and desk use rather than heavy workouts.
Battery math: per-charge vs total
The biggest spec trap in this category is confusing per-charge and total playtime. Total playtime includes the charging case. For example, the Free B11’s 35 hours assumes case recharges; each individual charge lasts 9–10 hours. If you rarely use the case, the Free B15’s 10 hours per charge is actually the longest single-session figure in the lineup.
How to choose in three steps
- Set a budget. $19.99 (Fit B18), $25.99–$29.99 (Free B11, Free B10, Free B15, Fit B17), or $49.99 (Free B16).
- Decide your environment. Gym and outdoor runs: Free B16 (IPX6) or the IPX5 models. Desk and commute: any model works.
- Check battery expectations. Longest total: Free B11 (35h). Longest per charge: Free B15 (10h).
This article was researched and written with AI assistance, reviewed by the Bugani SEO Team.
